r_(pixiv)
Ambiguous tag.
For the artist formerly tagged here, see ren (733).
For some potential artists named r: "r_* search":/artists?utf8=%E2%9C%93&search[name]=r_*&search[sort]=Date&commit=Search | "*_r search":/artists?utf8=%E2%9C%93&search[name]=*_r&search[sort]=Date&commit=Search